Question

The area of a rectangular land is 720 sq.metre and

perimeter is 108 metre. Out of length or breadth, which one is to
be decreased by what percentage to make it a square? Find it.​

Answer 1

Explanation:

2x + 2y = 108 and x*y = 720 so y = 720 /x sub into first equation

2x + 2 * 720/x = 108 multiply through by 'x'

2x^2 - 108x + 1440 = 0 Use quadratic formula to find x= 24,30

so the dimensions of the field are 24m x 30m

to make a square by reducing a dimension means reducing 30 to 24 :

a reduction of 6 out of 30

6/30 * 100% = 20 % reduction